The review... Part 3 - the R8 barrels
Blaser offers a large number of barrels for the R8.
To summarize:
- "standard" profile barrels have a diameter of 17 mm / 0.67" at the muzzle.
- "semi weight" profile barrels have a diameter of 19 mm / 0.75" at the muzzle.
- "safari" and match barrels have a diameter of 22 mm / 0.86" at the muzzle (Note: the one exception is the .300 Win Selous barrel that has a diameter of 19 mm at the muzzle).
- non-magnum caliber barrels are 58 cm / 22.8" long (Note: they can be special ordered with a length of 52 cm / 20.5").
- magnum caliber barrels are 65 cm / 25.6" long (Note: they can be special ordered with a length of 58 cm / 22.8").
- Any barrel can be ordered with or without iron sights.
View attachment 377490
Four points need to be made:
1) "Standard" profile R8 barrels are heavier than the typical American sporter barrels. For example my Weatherby Mark V .340 Wby has a muzzle diameter of 0.6" / 15.3 mm; and my Winchester 70 Classic Stainless .300 Wby has a muzzle diameter of 0.58" / 14.7 mm. In contrast, my "standard" R8 barrels have a muzzle diameter of 0.67" / 17 mm.
2) "Semi weight" barrels are significantly heavier, and "safari" barrels even more. Expect an ~11.5 lbs. "semi weight" scoped rifle with the kickstop in place to balance the rifle, and a ~12.5 lbs. "safari" scoped rifle with the kickstop in place to balance the rifle.
3) The flexibility to build the rifle you want is one of the advantages of the R8 system.
- Some want a 11.5 lbs. scoped .375. You get there with a "semi weight" barrel, the kickstop, and a typical 2.5-10x42 scope.
- Others like a 9.5 lbs. scoped .375. This is what the R8 weighs with a "standard" barrel, no kickstop and a typical 2.5-10x42 scope.
- Others prefer a 8.5 lbs. scoped .375. You get there by ordering a shorter 22.8" (580 mm) "standard" barrel, no kickstop, and putting a light 1-4x24 scope on it.
- Personally, I like a scoped .375 around 10.5 lbs. I get there with the "standard" barrel, the kickstop and a 2.5-10x42 scope.
To each their own
- And many will welcome a 12.5 lbs. scoped .416 Rem or .458 Lott. You get there with a "safari" barrel and the kickstop. Make it 13.5 lbs. with a steel receiver.
4) The R8 barrels length is not comparable to typical American barrels length. Because the bolt locks directly into the barrel of the R8, the R8 barrels have a 25 mm / 0.98" recess, and are in fact ~1" shorter than comparable American barrels.
View attachment 377492
As a consequence, R8 magnum barrels are in fact the equivalent length of American 24.6" barrels.
I was concerned about muzzle velocity. Magnum barrels loose typically 30 to 40 fps. per inch...
.223 Rem standard 58 cm / 22.8" (actual 21.8") barrel
The Federal American Eagle 55 gr FMJ load has a factory muzzle velocity of 3240 fps.
My R8 barrel clocks exactly 3240 average for 20 rounds.
.257 Wby standard 65 cm / 25.6" (actual 24.6") barrel
I was highly curious because the .257 Wby has acquired a reputation for often shooting at about the same muzzle velocity in Weatherby Vanguard 24" barrels and Weatherby Mark V 26" barrels.
The Weatherby .257 Wby 100 gr TTSX factory load has a factory muzzle velocity of 3570 fps.
My R8 barrel clocks 3470 average for 20 rounds.
Considering that this same load clocks 3580 fps (actually 10 fps faster than spec) in my Mark V, I know the factory spec to be realistic (a rarity with Weatherby ammunition
). Therefore, loosing 100 fps with the R8 is disappointing. Sure, it is in line with the barrel being 1.5" shorter (this may account for 45 to 60 fps), but, more probably, I guess that the Blaser throat is shorter than the Weatherby throat. Well..... it will last longer...
.300 Wby standard 65 cm / 25.6" (actual 24.6") barrel
The Weatherby .300 Wby 165 gr TTSX factory load has a factory muzzle velocity of 3330 fps.
My R8 barrel clocks 3248 average for 20 rounds.
This same load clocks 3255 fps in my CZ 550 with 26" McGowen chrome moly steel hand-lapped match barrel.
Unexpectedly, the 24.6" R8 barrel clocks almost the same speed as the 26" McGowen barrel. I can speculate that the absence of the long Weatherby throat could account for a loss of 80 fps on both barrels (?). This would be consistent with the lower speed in the .257 Wby barrel too...
.375 H&H standard 65 cm / 25.6" (actual 24.6") barrel
The Barnes .375 H&H 300 gr TSX factory load has a factory muzzle velocity of 2450 fps.
My R8 barrel clocks 2490 average for 20 rounds.
I believe that the Barnes .375 H&H loads are clocked with a 24" barrel at the factory, so it is not surprising that the R8 barrel clocks a little faster than spec.
Does it matter?
Sure it matters, but not until 350 yards for the .257 and .300 Wby, which essentially means that it does not matter
PS: nonetheless, since I have embraced modernity with the R8 and I put scopes on the Wby barrels that can look far (Zeiss V4 4-16x50), I plugged the actual chronographed muzzle speeds in the Shooter App before I sent the ballistic tables to Kenton Industries for the engraving of two custom BDC turrets. More on this later...